Consumption and Production of NO from European Forest Soils: Effects of Forests and Textures

  • Kim, D.S. (Department of Environmental Engineering, Kunsan National University) ;
  • Dijk, S.M.Van (Max-Planck-Institute for Chemistry, Biogeochemistry Department) ;
  • Meixner, F.X. (Max-Planck-Institute for Chemistry, Biogeochemistry Department)
  • Published : 2008.06.30

Abstract

Relationship between the optimum soil water content and clay content on soil samples from mid-latitude European forest was tested. Soil samples from 4 different experimental sites (two forest sites in the Netherlands and a Danish forest) were collected, and analyzed for the soil physical and chemical characteristics. Water retention curves for the soil samples were determined according to the standard procedure ISO 11274, and pF decreased with increase in soil water contents. NO is simultaneously produced and consumed by microbiological processes, which comprise of nitrification and denitrification. NO consumption and production rates were determined from the soil samples and compared to their corresponding water retention curves in order to find the optimum soil water content and matric potential for maximum NO release from mid-latitude soils. NO consumption rate coefficient (k) in Hollandse Hout was significantly lower than those in other soil sites. Maximum NO production was observed at an intermediate soil moisture ($0.2{\sim}0.3kg/kg$) in all the soil samples. Resulting from the NO consumption and production rates for the soils, the empirical NO fluxes of the different soils were calculated in the laboratory.

Keywords

References

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